Hi,

Thank you for reaching out to us.

Unfortunately, our authentication API isn't available publically.
In our React theme, we are using the following authentication approach:
1) The server returns an authentication token when the user logs in.
2) We store the returned token in localStorage.
3) When on every route change we do a token verification request to our API.
For reference, you can check out our authentication provider src/app/modules/auth/core/Auth.tsx

Regards,
Lauris Stepanovs,
Keenthemes Support Team